Nah, I think it's a state actor. Very obvious strategic move in line with a lot of other forms of attack underway. Of course they managed such an attack: it's really critical support of other stuff going on, a necessary component.

In retrospect we'll chalk this time up not as a messy time of great chaos, but as an unprecedented form of world war that's killed more people than all previous wars combined, and done more damage than any other war. Yet it's all cloaked in fog, incognito. Hell of a time to live through.

Who is being killed?

The article says the sealed records contained a lot of national intelligence information. I think that’s more interesting to state actors than individuals who want to sell it.